{"product_id":"sram-rear-derailleur-s100-eagle-drivetrain-12-speed-mechanical-replaces-sx-nx","title":"SRAM S100 Eagle Rear Derailleur 12-Speed Mechanical for Eagle Drivetrains Replaces SX \u0026 NX","description":"\u003cp\u003eSRAM's Rear Derailleur S100 Eagle is the culmination of over ten years of Eagle drivetrain innovation, designed to deliver precise and reliable shifting performance for 12-speed mountain bike setups. Engineered with an updated design, this derailleur enhances durability and component fitment, ensuring smooth operation even under the most demanding trail conditions. Whether you're upgrading from SX or NX models, the S100 offers a seamless integration with your Eagle drivetrain, giving you confidence in every gear change.\u003c\/p\u003e\n\n\u003cp\u003eFeaturing the innovative Half Mount option, the S100 provides superior hanger stability on UDH-equipped frames, reducing the risk of damage from impacts while maintaining a clean and streamlined appearance. The robust Drag Spring cage damper secures the chain firmly, preventing unwanted drops and enhancing chain retention during aggressive rides. Compatible with Eagle shifters using X-Actuation technology, this rear mech is optimized for wide-range Eagle cassettes up to 50T, making it ideal for tackling varied terrain with ease.\u003c\/p\u003e\n\n\u003cp\u003eBuilt with steel cage and pulley bearings, the S100 balances strength and performance, ensuring longevity without compromising smooth shifting. Its long cage design accommodates the full range of Eagle cassettes, supporting your ride's versatility. Whether you are an experienced mountain biker or looking to improve your bike’s drivetrain reliability, the SRAM Eagle S100 rear derailleur is crafted to meet high-torque demands with consistent, accurate gear changes.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eProviding precise and reliable shifting performance on 12-speed Eagle drivetrains\u003c\/li\u003e\n  \u003cli\u003eEnhancing hanger stability and protection with the Half Mount configuration on UDH frames\u003c\/li\u003e\n  \u003cli\u003eMaintaining chain retention securely with the proven Drag Spring cage damper\u003c\/li\u003e\n  \u003cli\u003eCompatibility with a wide range of Eagle cassettes up to 50T for versatile trail riding\u003c\/li\u003e\n  \u003cli\u003eDelivering durability and smooth operation through steel cage and pulley bearing construction\u003c\/li\u003e\n  \u003cli\u003eIntegrating seamlessly with Eagle shifters featuring X-Actuation technology for optimal performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUse with drivetrains that are not 12-speed Eagle-compatible\u003c\/li\u003e\n  \u003cli\u003eApplications requiring short cage derailleurs or non-Eagle cable pull ratios\u003c\/li\u003e\n  \u003cli\u003eBikes without UDH frames if Half Mount configuration benefits are desired\u003c\/li\u003e\n  \u003cli\u003eRiders needing compatibility with cassettes exceeding 50T maximum size\u003c\/li\u003e\n  \u003cli\u003eCasual or low-torque riding situations where advanced durability features may be unnecessary\u003c\/li\u003e\n  \u003cli\u003eSystems that do not support X-Actuation technology or Eagle shifters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this derailleur compatible with all Eagle drivetrains?\u003c\/strong\u003e\u003cbr\u003eThe SRAM S100 Rear Derailleur is designed specifically for 12-speed Eagle drivetrains and replaces SX and NX models, ensuring full compatibility within the Eagle family of components.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the benefit of the Half Mount configuration?\u003c\/strong\u003e\u003cbr\u003eThe Half Mount option improves derailleur hanger stability on frames equipped with UDH (Universal Derailleur Hanger) technology. It protects the hanger from impacts and provides a cleaner, more integrated look similar to Transmission systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this derailleur with cassettes larger than 50T?\u003c\/strong\u003e\u003cbr\u003eNo, the maximum cassette size supported by the S100 is 50 teeth. Using a larger cassette could impair shifting performance and damage the derailleur.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this derailleur work with SRAM shifters?\u003c\/strong\u003e\u003cbr\u003eYes, it is compatible with Eagle shifters that use X-Actuation technology, which ensures precise and consistent gear changes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat materials are used in the derailleur’s construction?\u003c\/strong\u003e\u003cbr\u003eThe cage and pulley bearings are made from steel, providing enhanced durability and strength for high-torque mountain biking demands.\u003c\/p\u003e\n\n\u003cp\u003eExplore more components from the \u003ca href=\"\/collections\/sram\"\u003eSRAM brand\u003c\/a\u003e and complement your setup with other parts from the \u003ca href=\"\/collections\/eagle-family\"\u003eEagle family\u003c\/a\u003e to maximize your ride performance.\u003c\/p\u003e","brand":"Sram","offers":[{"title":"Default Title","offer_id":47178928685231,"sku":"RD8205000","price":70.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/RD8205000_68381.jpg?v=1784200582","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/sram-rear-derailleur-s100-eagle-drivetrain-12-speed-mechanical-replaces-sx-nx","provider":"Swinnerton Cycles","version":"1.0","type":"link"}